U1(ntotal) and U2(ntotal), by applying Eq. (1). Thus, the thermal
transmission coefficient of each sample (U0(ntotal)) can be the
average value of U1(ntotal) and U2(ntotal) and according to the following
equation:
U0ðntotalÞ ¼
U1ðntotalÞ þ U2ðntotalÞ
2 ð2Þ
where U0(ntotal) is the thermal transmission coefficient of the sample,
U1(ntotal) and U2(ntotal) is the thermal transmission coefficient
related to the data registered by the heat flux sensors 1 and 2,
respectively.
Based on the prior experimental data (Fig. 7) and applying the
previous expressions the thermal transmission coefficient of each
lightweight concrete sample can be estimated. These coefficients
are presented in Table 4.
The results of Table 4 show the thermal insulation performance
benefits of using corn cob particles as an aggregate of lightweight
concrete when compared to a lightweight concrete with expanded
clay.